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Nursing Question Bank

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1265 available questions

Physics · Question 291

The speed of light in vacuum is approximately:

  1. 3 x 10^8 m/s
  2. 3 x 10^6 m/s
  3. 340 m/s
  4. 3 x 10^5 m/s
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Correct answer: A

3 x 10^8 m/s

The speed of light in vacuum is approximately 3 x 10^8 metres per second.

Physics · Question 292

The SI unit of resistance is:

  1. Ohm
  2. Farad
  3. Volt
  4. Ampere
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Correct answer: A

Ohm

The ohm is the SI unit of electrical resistance.

Physics · Question 293

Which lens is used to correct short-sightedness (myopia)?

  1. Cylindrical lens only
  2. Plane glass
  3. Concave lens
  4. Convex lens
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Correct answer: C

Concave lens

A diverging concave lens corrects myopia by moving the image focus back onto the retina.

Physics · Question 294

Sound cannot travel through:

  1. Steel
  2. A vacuum
  3. Water
  4. Air
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Correct answer: B

A vacuum

Sound is a mechanical wave and requires a material medium.

Physics · Question 295

Near Earth, with constant g, the increase in gravitational potential energy for a mass m raised by height h is:

  1. F/m
  2. mv
  3. (1/2)mv^2
  4. mgh
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Correct answer: D

mgh

Near Earth with approximately constant g, gaining height h increases gravitational potential energy by mgh.

Physics · Question 296

Which curved mirror provides a wide field of view for exterior vehicle rear viewing?

  1. Convex mirror
  2. Concave mirror
  3. Plane mirror only
  4. Parabolic mirror
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Correct answer: A

Convex mirror

A convex exterior mirror provides a wide field of view with an upright reduced image.

Physics · Question 297

A transformer works on the principle of:

  1. Electromagnetic induction
  2. Photoelectric effect
  3. Refraction
  4. Total internal reflection
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Correct answer: A

Electromagnetic induction

A transformer uses mutual electromagnetic induction between coils.

Physics · Question 298

For a fixed number of turns, the magnitude of induced EMF is proportional to the:

  1. Resistance of the coil
  2. Length of the room
  3. Rate of change of magnetic flux
  4. Colour of the wire
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Correct answer: C

Rate of change of magnetic flux

Faraday law relates induced EMF to the rate of change of magnetic flux linkage.

Physics · Question 299

The SI unit of capacitance is:

  1. Henry
  2. Farad
  3. Weber
  4. Tesla
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Correct answer: B

Farad

Capacitance is measured in farads, equivalent to coulombs per volt.

Physics · Question 300

The relation between time period T and frequency f is:

  1. T = 1/f
  2. T = f
  3. T = 2f
  4. T = f^2
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Correct answer: A

T = 1/f

Period and frequency are reciprocals: T = 1/f.